When it comes to killing flies, spiders, insects, mosquitoes, bugs or some creepy crawlies which intrude into your house, you probably turn to the common methods of helplessly slapping a rolled-up newspaper in the direction of the pest, spraying some mosquitocide to the insect in the room or using an electronic bug zapper in the garden. Now there is an effective product called salt gun coming out on the market which can make bug hunting not only easy and convenient, but fun. Common Ways to Kill Insects  Some insects are not harmful but can be nuisance pests. Some of them carry bacteria or germs, which can cause and spread serious diseases. Anyway, they are not welcomed and are wanted to be ridden from our house. There are several common ways to hunt or drive away insects. Keep doors...